All body colors can be easily changed in materials.To turn on interior lamps, add VrayLightMtl to them.

All doors are opened/closed by moving 'Doors' slider. Animation not included.Trolley poles can be rotated in all directions simply by moving Pole_control_main_dummy object. To rotate poles independently, move Pole_control_secondary_dummy object.Pole springs are stretching accordingly. This moves can be easily animated.Wheels have correct pivots and are ready for animation.

Model is ready to render with V-Ray renderer. No other plugins needed.